AMD today introduced its lineup of next-generation DirectX 11-capable ATI Mobility Radeon™ Premium graphics. AMD has based the Mobility Radeon HD 5800 series on the same 40-nm Juniper silicon as the desktop Radeon HD 5700 series. The Mobility 5700 and 5600 series are both based on Redwood, while the 5400 series is based on Cedar.
There's no Cypress here. That chip specifically for desktop cards like the Radeon HD 5870, and it's basically too big and too hot for laptops.
Speaking of power efficiency, the new Mobility 5000 lineup features "improved engine and memory clock scaling and clock gating," which helps lower power consumption at idle. AMD allows real-time switching between integrated and discrete graphics processors, too, so users can disable their discrete Radeons in order to get longer battery life. The switching technology supports both Intel and AMD platforms.
Other features include Eyefinity hexa-display capability, which you'll find on Mobility 5800-, 5700-, and 5600-series GPUs. Those who opt for Mobility 5400-series parts will be limited to quad-display setups. All of these GPUs also support up to 1GB of GDDR5 RAM, although you may see some of the lower-end parts with smaller amounts of DDR3 or DDR2 RAM. The choice will likely be up to laptop makers.
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